Tube-rolling mill.



TUBE ROLLING MILL.

APPLICATION FILED AUG.6, 1910.

Patented Nov. 7, 1911.

2 SHEETSSHEET 1.

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T.0URR,J& TUBE ROLLING MILL. APPLICATION FILED AUG. 6, 1910.

1 ,UO7,9241, Patented Nov. '7, 1911.

2 SHEETS-SHEET 2.

UNITED STATES PATENT. OFFICE.

'- THOMAS CURB, JR 01f AIRDltIE, SCOTLAND.

Specification of Letters Patent.

Patented Nov. '3, 1911.

To all whom. it concern:

Be it known that'I, THOMAS Conn, Jr., a subject of the King of Great Britain, residinvented certain new and useful Improve: ments in Tube-Rolling Mills, of which the following is a specification.

This invention relates to rolling mills which are specially adapted for rolling 1o tapered tubes. Under this invention the rolls, which are each made with a helical surface are carried in suitable housings,

ward in front of the furnace by means of screw and worm or other gear. The driving gear for the rolls is such that although the rolls are laterally traversed backward and go forward yet they are always capable of be ing rotated.

In order that my said invention may be clearly-understood I have hereunto appended an explanatory sheet of drawings whereon, I have shown, by way of illustration, or example, a method of rolling tapered tubes in accordance with my invention.

Figure 1 is an end view in section of the rolling mill. Fig. 2 is a front elevation Sothereof to an enlarged scale. Fig. 3 is a vertical section on the line X-X Fig. 2. Figs. 4 and 5 show modifications. 7

Referring to the drawings :-The rollin mill comprises two rolls a, 6, carried horiaajzontally in housings c, d, and geared together by spur gearing e, f. Each roll, as will be seen, is made with a spiral thread thereon and the spiral thread on the one roller is a right hand thread, while that on F4o',the other roller is a left hand thread. As will be seen the spiral groove of each roller is so made that the pass between the rollers is gradually lessened from the left hand toward the right, the screw thread on each Mhfiroller being gradually increased in breadth to produce this. The rolls are carried, as

. usual, in hearings in housings and the top roller is driven in any suitable manner at the desired speed which speed is imparted motto the bottom .roller by means of the gearg reiiresents a furnace in front of which ralls h, h, are laid and the housings of the rolls are mounted upon a bogie or carriage '5, provided with wheels j which'run upon the aforesaid rails k. The bogie is capable of being traversed backward and forward in front of the furnace by means of a E screwed spindle is rotated by means-of worm ing at Airdrie, Lanarkshire, Scotland, have 5 or other suitable gear, the screwed spindle passing through a block Z with nut formed therein and which is mounted on the bogie. m is a carriage which is movableon rails at right angles to the carriage z and carries a mandrel n.

The whole arrangement is, preferably,

such that the tubular skelp 0, as it is drawn from the furnace g, is passed between the rolls a, b, at the left hand thereof (Fig. 2) where the largest pass is provided and as the rolls rotate, the tube, while being rolled, moves from one end .to the other of the said rolls owing to the nature of the screw threads thereon and at' the same time is drawn from the furnace.

- In order that the tube may be drawn out of the furnace in a straight line the gear for moving the rolls and their housings is provided and the movement of the screwed spindle is is so regulated that, as the tube travels between the rolls in the one direction, the rolls are bodily moved in the oppositedirection in exact proportion.

- The rolls at Fig. 2 are cutwith grooves of semi-circular form in order to'roll tapered tubes of-round section, but, if it is desired to roll tapered tubes of rectangular section then the grooves can be made of V form as shown at Fig. 5.

The same arrangement may be adapted for rolling solid bars as well as tubes.

I do not limit myself to the specific details of construction, as the same ma be modified or altered and still come wlthiu the scope and tenor of the appended claims.

It is apparent that an embodiment of the invention described. and illustrated is adapted for .rolling solid bars as well as tubes.

It is evident that various shapes may be rolled, dependent upon the shapes of the rolls themselves, as indicated in Figs. 2, 4 and 5.

I do not limit myself to the exact form, proportion or arrangement shown and described, as these may be departed from in some respects without departing from the spirit of my invention as defined 1n the appended claims. 0

Having now fully described my invention what I claim and desire to secure by Letters Patent is 1. The combination with a furnace, of a carriage with spirally threaded pass form-- ing rolls thereon, and means for positively moving the carriage across the front of the furnace at such speed that the working tively fixed with the furnace, said carriage being provided with spirally threaded pass forming rolls, and a draw carriage provided with a mandrel and adapted to move substantially at ri ht angles to the line of movement of the first-mentioned carriage.

4. The combination with a furnace, of rails laid in front of the furnace, a carriage adapted to move in a straight line back and forward on the rails, pass forming rolls on the said carriage, a second set of rails laid substantially, at right angles to the first set, a draw carriage carrying a mandrel arranged to travel on the second set of rails and means for positively movin the first carriage across the front of the urnace at such speed that the working ortion of the pass shall remain relatively fixed with the furnace.

5. The combination with a furnace, of a carriage adapted to move across the front of the furnace, spirally threaded pass forming rolls on the carnage, means for positively moving the carriage and its rolls at such speed that the working portion of the pass is all remain relatively fixed with the furnace, a draw carriage and a mandrel projecting from said draw carriageand adapted to pass through between the rolls of the first carriage.

In testimony whereof I aflix my signature in presence of twowitnesses.

THOMAS CURB, J UNR. 

